A very good question!
Keepers and breeders will disagree over this subject - for sure. To be honest, we have seen little difference with those raised with constant UVB compared with those raised without constant UVB. After all, they brumate for months naturally, and they do that underground.
However... that does not mean we don't prefer to provide them the opportunity for some of those beneficial rays. Not all of our enclosures have UVB so we alternate cages every 2 months and the skinks get outdoor time when the weather permits.
If you only have the one - it shouldn't be too hard to get a UVB tube - 8 or 10 and a reg 60-75W lamp (for heat). If it was a rescue, chances are the extra care wouldn't hurt. When he brumates in the winter - he won't need the UVB turned on.
Be sure to provide supplements with his regular meals, and give him a snack on occasion (fruits are good for that). A good diet will help immensely.
Take care,
Morgana
